Healthy volunteer studies in Seattle, WA
105 studies at sites in and around Seattle accept healthy volunteers — people without the condition being studied. Many studies pay participants for their time and travel; the amount is set by each study, so ask the study team.
Development of Measures to Screen for Financial Hardship in Alzheimer's Disease and Dementia
RecruitingObservational studyHealthy volunteers welcomeMentions payment for participants
- Fred Hutchinson Cancer Center, Seattle
Delivering Evidence-Based Parenting Services to Families in Child Welfare Using Telehealth
RecruitingHealthy volunteers welcomeMentions payment for participants
- University of Washington, Seattle
Clinical and Genetic Evaluation of Individuals With Undiagnosed Disorders Through the Undiagnosed Diseases Network
RecruitingObservational studyHealthy volunteers welcome
- Seattle Children's Hospital, Seattle
- University of Washington, Seattle
Studying the PAGODA Algorithm for Chemotherapy Dose Changes to Prevent Unplanned Treatment Delays
RecruitingHealthy volunteers welcome
- Saint Joseph Medical Center Hematology and Oncology - Silverdale, Silverdale · 17 mi away
Collecting Blood Samples From Patients With and Without Cancer to Evaluate Tests for Early Cancer Detection
RecruitingObservational studyHealthy volunteers welcome
- Swedish Medical Center-Ballard Campus, Seattle
- Swedish Medical Center-Cherry Hill, Seattle
- Swedish Medical Center-First Hill, Seattle
- and 1 more
Testing an Enhanced Digital Delivery Model for Inherited Cancer Genetic Testing in Young Adults With Cancer
RecruitingHealthy volunteers welcome
- Swedish Medical Center-Ballard Campus, Seattle
- Swedish Medical Center-Cherry Hill, Seattle
- Swedish Medical Center-First Hill, Seattle
- and 1 more
Family Communications After Genetic Testing
RecruitingHealthy volunteers welcome
- Swedish Medical Center-Ballard Campus, Seattle
- Swedish Medical Center-Cherry Hill, Seattle
- Swedish Medical Center-First Hill, Seattle
- and 1 more
Observational Study of Decentralized Urine Optical Interaction Patterns Associated With Environmental Microplastic and Nanoplastic Exposure
RecruitingObservational studyHealthy volunteers welcome
- Decentralized / At-Home Participation (U.S.), Seattle
A Study of Investigational RSV/hMPV Combination and Investigational hMPV Vaccines in Younger and Older Adults
RecruitingPhase 1/2Healthy volunteers welcome
- GSK Investigational Site, Seattle
Wakaya: Rising Up for Choctaw Youth Health
RecruitingHealthy volunteers welcome
- University of Washington, IWRI, School of Social Work, Seattle
A Randomized Comparison of Stage-Based Care Versus Risk Factor-Based Care for Prevention of Cardiovascular Events
RecruitingHealthy volunteers welcome
- University of Washington, Seattle
Dominantly Inherited Alzheimer Network (DIAN)
RecruitingObservational studyHealthy volunteers welcome
- University of Washington, Seattle
BEATRIX: A Study to Learn About a Group B Streptococcus Vaccine in Healthy Pregnant Women and Their Babies
RecruitingPhase 3Healthy volunteers welcome
- Seattle Childrens Research Institute, Seattle
- Seattle Childrens Hospital, Seattle
- UW Medical Center Northwest, Seattle
- and 1 more
A Phase 3 Study of Revaccination in Subsequent Pregnancies With Bivalent RSV Vaccine and Duration of Protection of a Single Dose
RecruitingPhase 3Healthy volunteers welcome
- Seattle Children's Research Institute, Seattle
- Seattle Children's Hospital, Seattle
- University of Washington - Northwest, Seattle
- and 1 more
Phase 1/2 Study of Respiratory Syncytial Virus and Human Metapneumovirus (RSV+HMPV) Vaccine Candidate in Adults 60 Years of Age and Older
RecruitingPhase 1/2Healthy volunteers welcome
- Dm Clinical - Seattle- Site Number : 8400047, Seattle
Greek Connections Study
RecruitingHealthy volunteers welcome
- University of Washington School of Medicine, Seattle
American Lung Association (ALA) Lung Health Cohort
RecruitingObservational studyHealthy volunteers welcome
- University of Washington, Seattle
A Study on the Efficacy of a Vaccine Against Influenza in Adults ≥65 Years of Age
RecruitingPhase 3Healthy volunteers welcome
- GSK Investigational Site, Seattle
Interpersonal Communication Training and Vaccination Workflow Training Alone and in Combination to Improve Communication and Recommendations About HPV Vaccination in Pharmacies, IMPACT HPV Trial
RecruitingHealthy volunteers welcome
- Fred Hutch/University of Washington Cancer Consortium, Seattle
A Restorative Justice-Based Lung Cancer Screening Decision-Making Support Intervention Tailored for Black Individuals to Increase Lung Cancer Screening Among Black Community Members, RESTORE Trial
RecruitingHealthy volunteers welcome
- Fred Hutch/University of Washington Cancer Consortium, Seattle
A Study to Learn About a Clostridioides Difficile Vaccine in People 65 Years of Age and Older
RecruitingPhase 3Healthy volunteers welcome
- Kaiser Permanente Washington Health Research Institute (KPWHRI), Seattle
- University of Washington - Harborview Medical Center, Seattle
A Digital Intervention (ACT on Vaping App) for Vaping Cessation in Young Adult E-Cigarette Users
RecruitingHealthy volunteers welcome
- Fred Hutch/University of Washington Cancer Consortium, Seattle
A Novel Mobile Health Intervention for Improving Tobacco Cessation Among Young Adults
RecruitingHealthy volunteers welcome
- Fred Hutch/University of Washington Cancer Consortium, Seattle
HealthyTogether: RCT of a Dyadic Weight Management Intervention
RecruitingHealthy volunteers welcome
- VA Puget Sound Health Care System Seattle Division, Seattle, WA, Seattle
Cognitive Aftereffects of Neurotoxicity in Children and Young Adults With Relapsed/Refractory Hematologic Malignancies Who Receive CAR T-cell Therapy
RecruitingObservational studyHealthy volunteers welcome
- Seattle Children s Hospital, Seattle
Familial Inflammatory Bowel Disease Early Risk
RecruitingObservational studyHealthy volunteers welcome
- Seattle Children's Hospital, Seattle
The HOPE Biobank Resource (BMT CTN 2402 HOPE)
RecruitingObservational studyHealthy volunteers welcome
- Fred Hutchinson Cancer Center, Seattle
KABAWIL: Reducing Intersectional Stigmas
RecruitingPhase 1Healthy volunteers welcome
- University of Washington, Seattle
Telephone-Based Coaching Sessions (TAC) to Improve Advance Care Planning Participation in Advanced Cancer Patients and Their Support Person
RecruitingHealthy volunteers welcome
- Fred Hutch/University of Washington Cancer Consortium, Seattle
ASSESS ALL ALS Study
RecruitingObservational studyHealthy volunteers welcome
- University of Washington, Seattle
PREVENT ALL ALS Study
RecruitingObservational studyHealthy volunteers welcome
- University of Washington, Seattle
A Digital Smoking Cessation Intervention for Helping American Indians and Alaska Natives Quit Smoking, IndigeQuit Trial
RecruitingHealthy volunteers welcome
- Fred Hutch/University of Washington Cancer Consortium, Seattle
Mobile Health Application (PACT) to Improve Engagement in Advance Care Planning
RecruitingHealthy volunteers welcome
- Fred Hutch/University of Washington Cancer Consortium, Seattle
Limited Versus Extended Trophic Feeding (LET-FEED) Trial
RecruitingPhase 2/3Healthy volunteers welcome
- University of Washington, Seattle
Nuestro Valor: Increasing Healthier Food Access for Rural Latino Communities Through a Food Retail Intervention
RecruitingHealthy volunteers welcome
- University of Washington, Seattle
Genetic Determinants of Barrett's Esophagus and Esophageal Adenocarcinoma
RecruitingObservational studyHealthy volunteers welcome
- VA Puget Sound Health Care System, Seattle
- Fred Hutchinson Cancer Research Center, UWMC, Seattle
Collecting and Studying Blood and Tissue Samples From Patients With Locally Recurrent or Metastatic Prostate or Bladder/Urothelial Cancer
RecruitingObservational studyHealthy volunteers welcome
- Fred Hutch/University of Washington Cancer Consortium, Seattle
Natural History Study of and Genetic Modifiers in Spinocerebellar Ataxias
RecruitingObservational studyHealthy volunteers welcome
- University of Washington, Seattle
ARTFL LEFFTDS Longitudinal Frontotemporal Lobar Degeneration (ALLFTD)
RecruitingObservational studyHealthy volunteers welcome
- University of Washington, Seattle
PPMI Clinical - Establishing a Deeply Phenotyped PD Cohort
RecruitingObservational studyHealthy volunteers welcome
- Univ of Washington and VA Puget Sound Health Care System, Seattle
A Study of a Potential Disease Modifying Treatment in Individuals at Risk for or With a Type of Early Onset AD Caused by a Genetic Mutation
RecruitingPhase 2/3Healthy volunteers welcome
- University of Washington, Seattle
A Study of Potential Disease Modifying Treatments in Individuals at Risk for or With a Type of Early Onset AD Caused by a Genetic Mutation
RecruitingPhase 2/3Healthy volunteers welcome
- University of Washington, Seattle
Exploring the Decision to Drink (More) Alcohol Following Manipulations of Stress and Social Context
RecruitingHealthy volunteers welcome
- University of Washington, Seattle
Pancreatic Cancer Early Detection Consortium
RecruitingObservational studyHealthy volunteers welcome
- University of Washington, Seattle
Multicenter HomeVENT: Home Values and Experiences Navigation Track
RecruitingHealthy volunteers welcome
- Seattle Childrens Hospital, Seattle
An Adapted Evidence-Based Coaching Program for Fathers and Their Young Children in the Context of Home Visiting
RecruitingHealthy volunteers welcome
- Akin, Seattle
Lorlatinib for Newly-Diagnosed High-Grade Glioma With ROS or ALK Fusion
RecruitingEarly phase 1Healthy volunteers welcome
- Seattle Children's Hospital, Seattle
A Multilevel Intervention to Increase Colorectal Cancer Screening Tests in Patients With Abnormal Fecal Immunochemical Test Results, PROACT Trial
RecruitingHealthy volunteers welcome
- Fred Hutch/University of Washington Cancer Consortium, Seattle
Adapted Helping Ovarian Cancer Patients Cope Intervention to Address Burnout for Gynecologic Oncology Clinicians
RecruitingHealthy volunteers welcome
- Fred Hutch/University of Washington Cancer Consortium, Seattle
Childhood Cancer Survivor Study
RecruitingObservational studyHealthy volunteers welcome
- Seattle Children's Hospital, Seattle
Donor Stem Cell Transplant With Treosulfan, Fludarabine, and Total-Body Irradiation for the Treatment of Hematological Malignancies
RecruitingPhase 2Healthy volunteers welcome
- Fred Hutch/University of Washington Cancer Consortium, Seattle
Sleep and Performance
RecruitingHealthy volunteers welcome
- University of Washington School of Medicine, Seattle
Late Onset Alzheimer's Disease
RecruitingObservational studyHealthy volunteers welcome
- University of Washington, Seattle
Systems Analysis and Improvement to Optimize Opioid Use Disorder Care Quality and Continuity for Patients Exiting Jail
RecruitingHealthy volunteers welcome
- University of Washington, Seattle
Prostate Cancer Screening for People at Genetic Risk for Aggressive Disease, PATROL Study
RecruitingObservational studyHealthy volunteers welcome
- Fred Hutch/University of Washington Cancer Consortium, Seattle
Chemotherapy (Decitabine in Combination With FLAG-Ida) and Total-Body Irradiation Followed by Donor Stem Cell Transplant for the Treatment of Adults With Myeloid Malignancies at High Risk of Relapse
RecruitingPhase 1/2Healthy volunteers welcome
- Fred Hutch/University of Washington Cancer Consortium, Seattle
Contraceptive Efficacy Study of Ovaprene
RecruitingHealthy volunteers welcome
- Seattle Clinical Research Center, Seattle
QT-Digital Mental Health Engagement Study
RecruitingHealthy volunteers welcome
- University of Washington, Seattle
An Automatically Adjusting Prosthetic Socket for People With Transtibial Amputation
RecruitingHealthy volunteers welcome
- William H. Foege Hall, Seattle
Using Shared Decision Making to Improve Family Media Use Planning
RecruitingHealthy volunteers welcome
- Seattle Children's Research Institute, Seattle
BASIS Optimization
RecruitingHealthy volunteers welcome
- University of Washington, Seattle
A Study on the Safety and Immune Response of a Urinary Tract Infection (UTI) Vaccine in Adults 18-64 Years of Age and Clinical Efficacy in Females 18-64 Years of Age
RecruitingPhase 1/2Healthy volunteers welcome
- GSK Investigational Site, Seattle
Pharmacogenomics for Better Treatment of Fungal Infections Clinical Trial
RecruitingPhase 2Healthy volunteers welcome
- Fred Hutchinson Cancer Centre, Seattle
The INFLUENTIAL Trial- Evaluation of National Inpatient Influenza Vaccination Program
RecruitingHealthy volunteers welcome
- Seattle Children's Hospital, Seattle
Evaluating Whether an Educational Website Called Current Together After Cancer (CTAC) Improves Follow-up Care for Colorectal Cancer Survivors
RecruitingPhase 3Healthy volunteers welcome
- Swedish Medical Center-Ballard Campus, Seattle
- Swedish Medical Center-Cherry Hill, Seattle
- Swedish Medical Center-First Hill, Seattle
- and 1 more
Detailed Phenotypic and Genotype Study to Correlate RB1 Mutations Relating to Primary Ocular Tumors and Secondary Extra-ocular Metastasis.
RecruitingObservational studyHealthy volunteers welcome
- University of Washington, Seattle
Hemophilia A Research Program
RecruitingObservational studyHealthy volunteers welcome
- University of Washington, Seattle
Individual Factors of CBT Underlying Success
RecruitingHealthy volunteers welcome
- University of Washington, Seattle
Effects of NLS-133, a Potential Non-Hormonal "On-Demand" Male Contraceptive
RecruitingPhase 2Healthy volunteers welcome
- Population Center for Research in Human Reproduction and Departments of Medicine, University of Washington, Seattle
North American Mitochondrial Disease Consortium Patient Registry and Biorepository (NAMDC)
RecruitingObservational studyHealthy volunteers welcome
- Seattle Children's Hospital and Regional Medical Center, Seattle
Cerebral Autosomal Dominant Arteriopathy With Subcortical Infarcts and Leukoencephalopathy (CADASIL) Study
RecruitingObservational studyHealthy volunteers welcome
- University of Washington, Seattle
Study of Student Flourishing
RecruitingHealthy volunteers welcome
- University of Washington, Seattle
Study of Healthy Aging and Physical Function With Elamipretide
RecruitingPhase 2Healthy volunteers welcome
- University of Washington, Seattle
Ultrasound to Facilitate Stone Passage
RecruitingHealthy volunteers welcome
- VA Puget Sound Health Care System, Seattle
- University of Washington, Seattle
Development of a Quantifiable Ultrasound Biomarker for Hepatic Steatosis
RecruitingHealthy volunteers welcome
- University of Washington, Seattle
Effect of High-Intensity Exercise to Attenuate Cognitive Function Limitations and Train Exercise Habits in Older People Living With HIV
RecruitingHealthy volunteers welcome
- University of Washington, Seattle
A Trial Comparing Screening Mammography With and Without Assistance From Artificial Intelligence for Breast Cancer Detection and Recall Rates in Adult Patients
RecruitingPhase 4Healthy volunteers welcome
- University of Washington Health System, Seattle
Target ALS Biomarker Study; Longitudinal Biofluids, Clinical Measures, and At Home Measures
RecruitingObservational studyHealthy volunteers welcome
- University of Washington, Seattle
Advancing Suicide Intervention Strategies for Teens During High Risk Periods
RecruitingHealthy volunteers welcome
- Seattle Children's, Seattle
Variation in Gingival Inflammatory Responses
RecruitingHealthy volunteers welcome
- University of Washington, Seattle
Natural History Evaluation of Charcot Marie Tooth Disease (CMT) Types CMT1B, CMT2A, CMT4A, CMT4C, and Others
RecruitingObservational studyHealthy volunteers welcome
- Seattle Children's Hospital, Seattle
Genetics of Charcot Marie Tooth (CMT) - Modifiers of CMT1A, New Causes of CMT2
RecruitingObservational studyHealthy volunteers welcome
- Seattle Children's Hospital, Seattle
Caloric Balance Markers Study
RecruitingObservational studyHealthy volunteers welcome
- Institute for Systems Biology, Seattle
ADAPT Study: Assessing Diet, Appetite and Physiology Throughout Weight Loss Study)
RecruitingHealthy volunteers welcome
- Fred Hutch Cancer Center, Seattle
- University of Washington - South Lake Union, Seattle
Study of VGA039 in Healthy Volunteers and Patients With Von Willebrand Disease (VIVID)
RecruitingPhase 1/2Healthy volunteers welcome
- Washington Center for Bleeding Disorders, Seattle
Auditory Prediction and Error Evaluation in the Speech of Individuals Who Stutter
RecruitingHealthy volunteers welcome
- Univeristy of Washington, Seattle
School-based Paraeducator Education for Engagement at Recess
RecruitingHealthy volunteers welcome
- University of Washington, Seattle
Specialty Compared to Oncology Delivered Palliative Care for Patients With Acute Myeloid Leukemia
RecruitingHealthy volunteers welcome
- Fred Hutchinson Cancer Center, Seattle
Stress and Resilience
RecruitingHealthy volunteers welcome
- University of Washington, Seattle
TrialNet Pathway to Prevention of T1D
RecruitingObservational studyHealthy volunteers welcome
- Benaroya Research Institute, Seattle
Building Research for Intervention Development in Gliosis and Eating Habits
RecruitingHealthy volunteers welcome
- University of Washington, Seattle
Impact Trial of Helping Educational Leaders Mobilize Evidence
RecruitingHealthy volunteers welcome
- University of Washington, Seattle
Puberty, Diabetes, and the Kidneys, When Eustress Becomes Distress (PANTHER Study)
RecruitingObservational studyHealthy volunteers welcome
- Seattle Children's Hospital, Seattle
Virtual Implicit Bias Reduction and Neutralization Training (VIBRANT)
RecruitingHealthy volunteers welcome
- University of Washington, Seattle
Alcohol-focused Support of Survivors in Sororities Training (ASSIST) - Pilot
RecruitingHealthy volunteers welcome
- University of Washington, Seattle
Young Adult Education on Alcohol & Health
RecruitingHealthy volunteers welcome
- University of Washington, Seattle
Optimizing Infection Prophylaxis Prior to Shoulder Surgery
RecruitingHealthy volunteers welcome
- University of Washington, Seattle
BASIS-T Efficacy Trial
RecruitingHealthy volunteers welcome
- University of Washington, Seattle
Drug Excretion in Breast Milk
RecruitingPhase 4Healthy volunteers welcome
- University of Washington, Seattle
The Parkinson's Genetic Research Study
RecruitingObservational studyHealthy volunteers welcome
- VA Puget Sound Health Care System, Seattle
- University of Washington, Seattle
Smart Eyewear to Automatically Detect Drug Delivery Events
RecruitingObservational studyHealthy volunteers welcome
- University of Washington, Seattle
Enroll -HD: A Prospective Registry Study in a Global Huntington's Disease Cohort
RecruitingObservational studyHealthy volunteers welcome
- University of Washington Medical Center, Seattle
Behavioral and Neural Characteristics of Adaptive Speech Motor Control
RecruitingHealthy volunteers welcome
- University of Washington, Seattle
SpeeDx Ciprofloxacin gyrA Assay for N. Gonorrhoeae Gonococcal Infection
RecruitingHealthy volunteers welcome
- Public Health -- Seattle & King County Sexual Health Clinic, Seattle
Optimizing Pain Control in Transurethral Resection of the Prostate
RecruitingPhase 4Healthy volunteers welcome
- Virginia Mason Medical Center, Seattle
From ClinicalTrials.gov, data retrieved Oct 5, 2026. Each study sets its own eligibility; the study team decides who can join.